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Extension Bulletin, no. 114 (Feb. 1923)

Extension Bulletin, no. 114 (Feb. 1923)

EXTENSION BULLETIN No. 114 FEBRUARY. 1923
THE SAN JOSE SCALE
By J. J. Davis
Department of Entomology
Purdue University Agricultural Experiment Station
Injury to apple trees by the San Jose Scale—in this case due to lack of
thoroughness in spraying. Only the lower, outer branches were thoroughly sprayed'
the inside of the tree and upper branches retaining a heavy infestation of scale, killing
the upper branches and later in the season infesting and destroying many of the lower,
outer branches, which are shown as live wood in this photograph.
Purdue University Department of Agricultural Extension
G. I. Christie, Director, LaFayette, Indiana
Co-operative Agricultural Extension Work, Acts of May 8 and June 30, 1914

EXTENSION BULLETIN No. 114 FEBRUARY. 1923
THE SAN JOSE SCALE
By J. J. Davis
Department of Entomology
Purdue University Agricultural Experiment Station
Injury to apple trees by the San Jose Scale—in this case due to lack of
thoroughness in spraying. Only the lower, outer branches were thoroughly sprayed'
the inside of the tree and upper branches retaining a heavy infestation of scale, killing
the upper branches and later in the season infesting and destroying many of the lower,
outer branches, which are shown as live wood in this photograph.
Purdue University Department of Agricultural Extension
G. I. Christie, Director, LaFayette, Indiana
Co-operative Agricultural Extension Work, Acts of May 8 and June 30, 1914